Writing a scientific report and got stuck on the following. I have a few sentences like this:
The downside of cycling through the rain is I will be cold
Which is basically: "The [some aspect] is [consequence]".
A colleague mentioned it is incorrect without the word "that" (this might be because of our native language, which is Dutch):
The downside of cycling through the rain is that I will be cold
So, what is the role of "that" here? Is it required?
Comparable questions that I think do not cover this exactly: Is 'that' required in this sentence?, Is "is that" grammatically correct?